See, many aspirants simultaneously pursue both the Chartered Accountancy course and the Bachelors in Commerce as most of the people are not sure that whether they would be able to clear the CA exam or not, and if they fail, BCom will ensure that those years of their life did not go to waste.

So, ideally you should pursue both the things simultaneously as it will give you a much required safety net and exit route.

Hope I have answered your question. All the best!